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Finding the Fourth Proportional to 390,521.50, 538,765.64 and 245,241.84

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Solution

The fourth proportional to 390,521.50, 538,765.64 and 245,241.84 is: 338,337.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,521.50 : 538,765.64 = 245,241.84 : x
  2. Step 2: Convert to fraction form
    390,521.50/538,765.64 = 245,241.84/x
  3. Step 3: Cross multiply
    390,521.50x = 538,765.64 × 245,241.84
  4. Step 4: Simplify right side
    390,521.50x = 132,127,872,962.34
  5. Step 5: Solve for x
    x = 132,127,872,962.34/390,521.50
  6. Step 6: Final answer
    x = 338,337.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.